Curved teeth on VR racks
Rack tooth surface has to be adjusted in order to achieve variable ratio.
FIG. 8 is a sectional view to a very much enlarged scale of the rack and pinion of FIG. 5a showing the particular features of contact between the rack and the pinion being a section through the centerline of the rack;
FIG. 9 is a plan view in diagrammatic form of the pinion and the rack showing the position of various section lines referred to in the description;